СИСТЕМА SFI, Diagnostic DTC:P0500

DTC Code DTC Name
P0500 Vehicle Speed Sensor "A"

DESCRIPTION

The wheel speed sensor monitors the wheel rotation speed and sends a signal to the skid control ECU. The skid control ECU converts the wheel speed signal into a 4-pulse signal and transmits it to the ECM via the combination meter. The ECM determines the vehicle speed based on the frequency of the pulse signal.

Tech Tips


  • A voltage of 5 or 12 V is output from each ECU and then input to the combination meter. The signal is changed to a pulse signal at the transistor in the combination meter. Each ECU controls the respective system based on the pulse signal.

  • If a short occurs in any of the ECUs or in the wire harness connected to an ECU, all systems in the diagram below will not operate normally.

A001CX8E71
*a 4-Pulse
*b Skid Control
*c from Wheel Speed Sensor
*d Combination Meter
DTC No. DTC Detection Condition Trouble Area
P0500

While vehicle being driven, no vehicle speed sensor signal to ECM.

(2 trip detection logic)

  • Open or short in speed signal circuit

  • Combination meter

  • Skid control ECU

  • ECM

WIRING DIAGRAM

A0019Q1E02
*1 Skid Control ECU
*2 Combination Meter
*3 to Other ECUs

CAUTION / NOTICE / HINT

Tech Tips

Read freeze frame data using the intelligent tester. The ECM records vehicle and driving condition information as freeze frame data the moment a DTC is stored. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.

PROCEDURE


  1. CHECK OPERATION OF SPEEDOMETER


    1. Drive the vehicle and check whether the operation of the speedometer in the combination meter is normal.

      Tech Tips


      • The vehicle speed sensor is operating normally if the speedometer reading is normal.

      • If the speedometer does not operate, check it by following the procedure described in speedometer malfunction Click here.


    NG

    GO TO MALFUNCTION IN SPEEDOMETER Click here

    OK

  2. READ VALUE USING INTELLIGENT TESTER (VEHICLE SPEED)


    1. Connect the intelligent tester to the DLC3.

    2. Turn the engine switch on (IG) and turn the tester ON.

    3. Enter the following menus: Powertrain / Engine / Data List / Vehicle Speed.

    4. Drive the vehicle.

    5. Read the value displayed on the tester.

      OK
      Vehicle speeds displayed on tester and speedometer display are equal.

    OK

    CHECK FOR INTERMITTENT PROBLEMS Click here

    NG

  3. CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)


    1. Disconnect the L10 combination meter connector.

      A001FVZE02
      *1 Front view of wire harness connector: (to Combination Meter)
      *2 Front view of wire harness connector: (to ECM)

    2. Disconnect the A14 ECM connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open)
      Tester Connection Condition Specified Condition
      L10-10 (+S) - A14-24 (SPD) Always Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Condition Specified Condition
      L10-10 (+S) or A14-24 (SPD) - Body ground Always 10 kΩ or higher

      Tech Tips

      If the wire has a short, check the speed signal circuit in other systems related to the vehicle speed signal (e.g. the navigation system, audio system, etc.).


    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK COMBINATION METER (+S VOLTAGE)


    1. A001AQWE03
      *1 Front view of wire harness connector: (to Combination Meter)

      Disconnect the L10 combination meter connector.

    2. Turn the engine switch on (IG).

    3. Measure the voltage according to the value(s) in the table below.

      Standard voltage
      Tester Connection Switch Condition Specified Condition
      L10-10 (+S) - Body ground Engine switch on (IG) 4.5 to 5.5 V

      Tech Tips

      A voltage of 5 or 12 V is output from each ECU and then input to the combination meter.


    NG

    REPLACE ECM Click here

    OK

  5. CHECK COMBINATION METER (SPD SIGNAL OUTPUT WAVEFORM)


    1. A001BCYE03
      *1 Component with harness connected: (Combination Meter)
      *2 Wheel Turning

      Move the shift lever to N.

    2. Jack up the vehicle.

    3. Turn the engine switch on (IG).

    4. Measure the voltage according to the value(s) in the table below.

      Standard voltage
      Tester Connection Condition Specified Condition
      L10-10 (+S) - Body ground

      • Engine switch on (IG)

      • Wheel turned slowly

      		 Voltage generated intermittently

      Tech Tips


      • The output voltage should fluctuate up and down, similarly to the diagram, when the wheel is turned slowly.

      • A voltage of 5 or 12 V is output from each ECU and then input to the combination meter.


    OK

    REPLACE ECM Click here

    NG

  6. CHECK COMBINATION METER (SPD SIGNAL INPUT WAVEFORM)


    1. A00196NE02
      *1 Component with harness connected: (Combination Meter)
      *2 Wheel Turning

      Move the shift lever to N.

    2. Jack up the vehicle.

    3. Turn the engine switch on (IG).

    4. Measure the voltage according to the value(s) in the table below.

      Standard voltage
      Tester Connection Condition Specified Condition
      L10-9 (SI) - Body ground

      • Engine switch on (IG)

      • Wheel turned slowly

      		 Voltage generated intermittently

      Tech Tips

      The output voltage should fluctuate up and down, similarly to the diagram, when the wheel is turned slowly.


    OK

    REPLACE NO. 1 METER ECU Click here

    NG

  7. CHECK HARNESS AND CONNECTOR (COMBINATION METER - SKID CONTROL ECU)


    1. A001FH5E01
      *1 Front view of wire harness connector: (to Combination Meter)
      *2 Front view of wire harness connector: (to Skid Control ECU)

      Disconnect the L10 combination meter connector.

    2. Disconnect the A19 skid control ECU connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard resistance (Check for open)
      Tester Connection Condition Specified Condition
      L10-9 (SI) - A19-23 (SP1) Always Below 1 Ω
      Standard resistance (Check for short)
      Tester Connection Condition Specified Condition
      L10-9 (SI) or A19-23 (SP1) - Body ground Always 10 kΩ or higher
      Result
      Result Proceed to
      NG A
      OK (for LHD) B
      OK (for RHD) C

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    B

    REPLACE SKID CONTROL ECU Click here

    C

    REPLACE SKID CONTROL ECU Click here